2. Nudibranch of the week!!!

3. Sea birds and marine reptiles

4. Marine Reptiles 7000 living species Poikilotherms Ectotherms
First appeared more than 3MYA

5. Sea Turtles An ancient group of reptiles Bodies enclosed in a carapace
Sea turtles cannot retract heads into shell
9 species
Must return to land to reproduce

6. Green Turtles, Chelonia mydas
Live primarily in warm waters
Shells grow 1m in length
Feed on seagrasses and seaweeds
Lack teeth, have strong jaws

7. Leatherback Dermochelys coriacea
Largest sea turtle
May attain a length of 7ft and weigh 1200lb
Have a series of small bones buried in dark skin
An open water, deep diving species
Diet consists of jellyfish
Endangered

8. Sea Turtle Reproduction
All sea turtles must return to land to reproduce
Lay eggs on remote sandy beaches
DNA of turtles breeding in one area differs from DNA of turtles breeding in another area
Females only venture at hight to lay eggs
Incubation period is about 60 days
Hatchlings are very vulnerable

9. Sea Snakes 55 species Found in the Indian and Pacific Oceans
Most are 3-4 feet
Ovoviviparous
Carnivores
Most common of all venomous snakes
Rarely aggressive

10. Other Marine Reptiles Saltwater crocodile Marine iguana
Inhabits mangrove swamps in Eastern Indian Ocean, Australia, Western Pacific islands
Most common on coast
Record of one being 33ft, but on average are 20ft.
Most aggressive of all marine animals
Marine iguana
Galapagos Islands
Spends most of its time basing in large groups of rocks
Eats seaweeds
Can dive up to 33feet

11. Seabirds Seabirds have significant advantages over reptiles
Ability to fly
homeotherms
Eddotherms
Water proof feathers
Nest on land
Breed in large colonies
Distributed pole to pole
9700 species
Need a lot of food to supply energy to maintain their body temperatures

12. Penguins Flightless birds
Bones are denser than any other bird to make diving easier
18 species
All in live in the southern hemisphere

13. Where Penguins Live

14. Tubenoses
A large group of seabirds with distinctive tube like nostrils and heavy beaks that are curved
They have salt glands to get rid of excess salt
Skilled fliers
Scavangers
Many breed in the area of Anarctica
Faithful relationships

15. Pelicans and Related Birds
Webbing between all four toes
Pelicans have a unique pouch below their beaks
Nest in large colonies
Deposits of guano are mined for fertilizer
Build messy nests of twigs and whatever else they can find

16. Gulls and Related Birds
Largest variety of sea birds
Will eat just about anything
The Arctic tern wanders miles during the year
Puffins and razorbills are also related

17. Shorebirds Wading birds that do not have webbed feet Many live inland
Common in estuaries and marshes
Common examples
Plovers
sandpipers